Anti-pinching structure for supporting frame

ABSTRACT

The present invention discloses an anti-pinching structure for supporting frame, in which a slidable or rotatable positioning block is disposed on the hinge portion of the connection base and the supporting framework and a hinge unit is disposed on the hinge portion of the connection base and the supporting framework, such that the torsion spring of the hinge units may form a supporting torsion against the supporting framework and the positioning block may prevent the supporting framework from springing back.

FIELD OF THE INVENTION

The present invention relates to an anti-pinching structure forsupporting frame and in particular to an anti-pinching structuresuitable for preventing the spring back of a supporting framework.

BACKGROUND OF THE INVENTION

“Supporting Structure with Retaining Function,” developed by the presentinventor, is disclosed in the ROC Patent No. M309183 on Apr. 1, 2007,comprises a base 1, whose top surface is fixedly disposed with asupporting frame 12; an retaining part 2, which may slidingly disposedon the top of the face of the base 1 and which protrudes to form afastening tenon 25 horizontally; a connecting part 3, whose bottom andtop portions have a lower end 31 and upper end 32, respectively, and inwhich the lower end 31 pivotally connected with the base 1 by a basehinge 5 to form a rotating status and to reach a engaged status by thefastening tenon 25 as well as reach a disengaged status by thetransverse sliding of the retaining part 2; and a main frame 4, whoselower end is disposed with a main supporter 41 which is pivotallyconnected with the upper end 32 of the connecting part 3 by a main hinge6 to form a rotating status.

However, if the supporting structure is to be simplified into aframework, the springing back of the torsion spring of the hinge of thesupporting frame has to be resolved. Otherwise, when the supportingframework is rotated, the supporting framework, under the action of thetorsion spring, may pinch assemble or maintenance staff. Thus theaforementioned invention is not conducive to assembling, maintenance, ordismantling.

SUMMARY OF THE INVENTION

The main object of the present invention is to provide an anti-pinchingstructure for supporting frame, in which a slidable or rotatablepositioning block is disposed on the hinge portion of the connectionbase and the supporting framework and a hinge unit is disposed on thehinge portion of the connection base and the supporting framework, suchthat the torsion spring of the hinge units may form a supporting torsionagainst the supporting framework and when the supporting framework isrotated to the positioning point, the positioning block may prevent thesupporting framework from springing back.

The major improvement of the present invention lies in the fact that thefirst fixing base of the supporting framework is disposed with aslidable or rotatable positioning block, which may be inserted into thepositioning hole or positioning notch of the side plate of theconnection base to prevent the supporting framework from springing backunder the action of the torsion spring and which is conducive toassemble and dismantle displayer or other electronic device on theconnection base and can avoid pinching maintenance staff duringmaintaining work.

Another improvement of the present invention lies in the fact that whenthe supporting framework is folded up, the two protrusions of the secondlocking piece may constrain the two protrusions of the first lockingpiece so as to form a locking status; when the supporting framework isspread from the folded status, the two protrusions of the second lockingpiece may cross the two protrusions of the first locking pieces and thusdisengage from the locking status.

An anti-pinching structure for supporting frame according to onepreferred embodiment of the present invention comprises: a connectionbase having two side plates; a supporting framework disposed with afirst and second fixing base; a pair of hinge units pivoting the twoside plates of the connection base onto the first and second fixingbases, respectively; a cover body fixedly disposed on the first fixingbase; a slidable positioning block disposed between the cover body andthe first fixing base; wherein the spindle of the hinge units may beinsertingly disposed onto the torsion spring and the spring fixingplate, the front end of the torsion spring is embeddedly fixed on thetwo side plates of the connection base, and the rear end of the torsionspring is embeddedly fixed on the spring fixing plate; when thesupporting framework is rotated, the first and second fixing bases maydrive the spindle and the spring fixing plate to rotate; and when thesupporting framework is rotated to the positioning point, the tipportion of the positioning block is pushed into the positioning hole ofthe side plates of the connection base, so as to prevent the supportingframework from springing back.

An anti-pinching structure for supporting frame according to anotherpreferred embodiment of the present invention comprises: a connectionbase having two side plates; a supporting framework disposed with afirst and second fixing base; a pair of hinge units pivoting the twoside plates of the connection base onto the first and second fixingbases, respectively; a rotatable positioning block pivoted onto thefirst fixing base; wherein the spindle of the hinge units may beinsertingly disposed onto the torsion spring and the spring fixingplate, the front end of the torsion spring is embeddedly fixed on thetwo side plates of the connection base, and the rear end of the torsionspring is embeddedly fixed on the spring fixing plate; when thesupporting framework is rotated, the first and second fixing bases maydrive the spindle and the spring fixing plate to rotate; and when thesupporting framework is rotated to the positioning point, thepositioning block is poked and thus the protrusion of the positioningblock is inserted into the positioning notch of the first fixing baseand the positioning notch of the side plate of the connection base so asto prevent the supporting framework from springing back.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention can be more fully understood by reference to thefollowing description and accompanying drawings, in which:

FIG. 1 is a perspective assembly view of the one preferred embodiment ofthe present invention;

FIG. 2 is a partial perspective assembly view of the one preferredembodiment of the present invention;

FIG. 3 is the exploded perspective view of the one preferred embodimentof the present invention;

FIG. 4 is a partial, enlarged cross-sectional views taken through theA-A line in FIG. 2;

FIG. 5 is another partial, enlarged cross-sectional views taken throughthe A-A line in FIG. 2;

FIG. 6 is a perspective assembly view of the fixing base, positioningblock, and cover body of the present invention;

FIG. 7 is the cross-sectional view taken through the B-B line in FIG. 6;

FIG. 8 is an illustrative movement of FIG. 7;

FIG. 9 is a perspective assembly view of the second preferred embodimentof the present invention; and

FIG. 10 is a partial perspective assembly view of the second preferredembodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the accompanying drawings, embodiments of the presentinvention will be explained in detail.

With reference to FIGS. 1 to 5, according to one preferred embodiment ofthe present invention, an anti-pinching structure for supporting frameis disposed between a connection base 10 and a supporting framework 20,comprising a first fixing base 30, a cover body 40, a positioning block42, a spindle 50, a first locking piece 60, a second locking piece 70, aspring fixing plate 80, a torsion spring 90; the fixing base 30 isfixedly disposed on the supporting framework 20 and the through hole 31of the fixing base 30 has at least a side edge 32; the cover body 40fixedly disposed on the fixing base 30 and has a guide slot 41; thepositioning block 42 disposed between the fixing base 30 and the coverbody 40 may slide along the guide slot 41; the spindle 50 disposed withat least a flat surface 51 may be insertingly disposed on the fixingbase 30 and the side plates 11 of the connection base 10; the firstlocking piece 60 has a round hole 61 for the insertion of the spindle 50and a fixed end 62 to be embeddedly fixed on the side plates 11 of theconnection base 10; the second locking piece 70 is insertingly disposedon the spindle 50 and the through hole of the second locking piece 70has at least a side edge 72; the spring fixing plate 80 is insertinglydisposed onto the spindle 50 and the through hole 81 of the springfixing plate 80 has at least a side edge 82; the sleeve 84 isinsertingly disposed on the spindle 50 and positioned between the secondlocking piece 70 and the spring fixing plate 80; the torsion spring 90is insertingly disposed in the sleeve 84, and the front end 91 and rearend 92 of the torsion spring 90 are embeddedly fixed, respectively, onthe fixing slot 13 of the side plate 11 and on the fixing slot 83 of thespring fixing plate 80; wherein the end of the spindle 50 may beinsertingly disposed with a resilient element 52 and be tighten with anut 53, and the resilient element 52 may impel the spring fixing plate80 and sleeve 84 to prompt the second locking piece 70 to intimatelycontact with the first locking piece 60; consequently, when thesupporting framework 20 is folded, the two protrusions 73 of the secondlocking piece 70 may constrain the two protrusions 63 of the firstlocking piece 60 so as to form a locking status; when the supportingframework 20 is spread from the folded status, the protrusions 73 of thesecond locking piece 70 may cross the protrusions 63 of the firstlocking pieces 60 and thus disengage from the locking status and thetorsion spring 90 may form a supporting torsion against the supportingframework 20; when the supporting framework 20 is rotated to thepositioning point, the positioning block 42 is pushed and thus the tipportion 43 of the positioning block 42 may be passed through thepositioning hole 33 of the fixing base 30 and inserted into thepositioning hole 14 of the side plate 11 so as to prevent the supportingframework 20 from springing back.

With reference to FIG. 2, the side plates 11 of the connection base 10are disposed with a stop piece 15, respectively, and the through hole151 of the stop piece 15 has at least a side edge 152 such that the stoppiece 15 may be rotated integratedly with the spindle 50. When thesupporting framework 20 is rotated, the stop portion 153 of the stoppiece 15 may abut against the two stop portions 16 of the side plate 11so as to constrain the rotation angle.

With reference to FIGS. 4 and 5, the resilient element 52 is a pluralityof spring discs 521 or a spring. The spring discs 521 are formed to havearc faces and alternately inserted in opposite faces onto the spindle50. A gasket 54 is disposed between the resilient element 52 and the nut53 and a short sleeve 55 is disposed between the resilient element 52and the spring fixing plate 80. Furthermore, the spindle 50 may beinsertingly disposed with a frictional piece 64 and a spring piece 74.The frictional piece 64 is positioned between the first and secondlocking pieces 60, 70, and the through hole 641 of the frictional piece64 has at least a side edge 642 such that the frictional piece 64 may berotated integratedly with the spindle 50. The spring piece 74 ispositioned between the second locking piece 70 and the sleeve 84.

With reference to FIGS. 6 to 8, in one preferred embodiment of thepresent invention, the positioning block 42 may extend to form a button45 integratedly or may be fixedly disposed with a button 45 separately.A spring 46 may be disposed inside the guide slot 41 of the cover body40, and when the supporting framework 20 is rotated to the positioningpoint, the spring 46 may push the positioning block 42 so as to insertthe tip portion 43 of the positioning block 42 into the positioning hole14 of the side plate 11.

Furthermore, the preferred embodiment of the according to theanti-pinching structure of the present invention may also comprise aconnection base 10, a supporting framework 20, a pair of hinge units 1,a cover body 40, a slidable positioning block 42; the connection base 10has two side plates 11; the supporting framework 20 is disposed with afirst and second fixing base 30, 30 a; the pair of hinge units 1 maypivot the two side plates 11 onto the first and second fixing bases 30,30 a, respectively; the cover body 40 is fixedly disposed on the firstfixing base 30; the slidable positioning block 42 is disposed betweenthe cover body 40 and the first fixing base 30; wherein the spindle 50of the hinge units 1 may be insertingly disposed on the torsion spring90 and the spring fixing plate 80, the front end 91 of the torsionspring 90 is embeddedly fixed on the two side plates 11, and the rearend 92 of the torsion spring 90 is embeddedly fixed on the spring fixingplate 80; when the supporting framework 20 is rotated, the first andsecond fixing bases 30, 30 a may drive the spindle 50 and the springfixing plate 80 to move integratedly; and when the supporting framework20 is rotated to the positioning point, the tip portion 43 of thepositioning block 42 is pushed into the positioning hole 14 of the sideplate 11, so as to prevent the supporting framework 20 from springingback.

With reference to FIGS. 9 and 10, the second embodiment of ananti-pinching structure according to the present invention comprises aconnection base 10, a supporting framework 20, a pair of hinge units 1,a rotatable positioning block 47; the connection base 10 has two sideplates 11; the supporting framework 20 is disposed with a first andsecond fixing base 30, 30 a; the pair of hinge units 1 may pivot the twoside plates 11 onto the first and second fixing bases 30, 30 a,respectively; the slidable positioning block 47 is pivoted onto thecylinder 34 of the first fixing base 30 (the positioning block 47 may beembodied as rivet or screw pivoted thereon); wherein the spindle 50 ofthe hinge units 1 may be insertingly disposed on the torsion spring 90and the spring fixing plate 80, the front end 91 of the torsion spring90 is embeddedly fixed on the two side plates 11, and the rear end 92 ofthe torsion spring 90 is embeddedly fixed on the spring fixing plate 80;when the supporting framework 20 is rotated, the first and second fixingbases 30, 30 a may drive the spindle 50 and the spring fixing plate 80to move integratedly; and when the supporting framework 20 is rotated tothe positioning point, the positioning block 47 is poked and thus theprotrusion 471 of the positioning block 47 is inserted into thepositioning notch 35 of the first fixing base 30 and the positioningnotch 17 of the side plate 11 so as to prevent the supporting framework20 from springing back. The positioning block 47 may protrude to form apoke rod 472.

While the invention has been described with reference to the a preferredembodiment thereof, it is to be understood that modifications orvariations may be easily made without departing from the spirit of thisinvention, which is defined by the appended claims.

1-8. (canceled)
 9. An anti-pinching structure for supporting frame,comprising a first fixing base fixedly disposed on the supportingframework and the through hole of the fixing base having at least a sideedge; a positioning block pivoted on the fixing base and having aprotrusion; a spindle disposed with at least a flat surface andinsertingly disposed on the fixing base and the side edge of theconnection base; a first locking piece embeddedly fixed on the sideplate of the connection base and having a round hole for the insertionof the spindle; a second locking piece insertingly disposed on thespindle and the through hole of the second locking piece having at leasta side edge; a spring fixing plate insertingly disposed onto the spindleand the through hole of the spring fixing plate having at least a sideedge; a sleeve insertingly disposed on the spindle and positionedbetween the second locking piece and the spring fixing plate; and atorsion spring insertingly disposed on the sleeve and the front and rearends of the torsion spring embeddedly fixed, respectively, on the sideplate of the connection base and on the spring fixing plate; wherein theend of the spindle may be insertingly disposed with a resilient elementand be tighten with a nut, and the resilient element may impel thespring fixing plate and sleeve to prompt the second locking piece tointimately contact with the first locking piece; consequently, when thesupporting framework is folded, the two protrusions of the secondlocking piece may constrain the two protrusions of the first lockingpiece so as to form a locking status; when the supporting framework isspread from the folded status, the two protrusions of the second lockingpiece may cross the two protrusions of the first locking pieces and thusdisengage from the locking status and the torsion spring may form asupporting torsion against the supporting framework; when the supportingframework is rotated to the positioning point, the positioning block ispoked and thus the protrusion of the positioning block is inserted intothe positioning notch of the first fixing base and the positioning notchof the side plate so as to prevent the supporting framework fromspringing back.
 10. The anti-pinching structure for supporting frame asdefined in claim 9, wherein the positioning block is pivoted by rivet orscrew onto the fixing base and the positioning block may protrude toform a poke rod.
 11. The anti-pinching structure for supporting frame asdefined in claim 9, wherein the side plate of the connection base isdisposed with a stop piece which may be rotated integratedly with thespindle and when the supporting framework is rotated, the stop piece mayabut against the stop portion of the side plate so as to constrain therotation angle.
 12. The anti-pinching structure for supporting frame asdefined in claim 9, wherein the resilient element is a plurality ofspring discs or a spring and the spring discs are formed to have arcfaces and alternately inserted in opposite faces onto the spindle, and agasket is disposed between the resilient element and the nut and also ashort sleeve is disposed between the resilient element and the springfixing plate.
 13. The anti-pinching structure for supporting frame asdefined in claim 9, wherein the spindle may be insertingly disposed witha frictional piece and a spring piece, the frictional piece ispositioned between the first and second locking pieces, and the throughhole of the frictional piece has at least a side edge such that thefrictional piece may be rotated integratedly with the spindle, and thespring piece is positioned between the second locking piece and thesleeve.
 14. An anti-pinching structure for supporting frame, comprisinga connection base having two side plates; a supporting frameworkdisposed with a first and second fixing base; a pair of hinge unitspivoting the two side plates of the connection base onto the first andsecond fixing bases, respectively; and a rotatable positioning blockpivoted onto the first fixing base; wherein the spindle of the hingeunits may be insertingly disposed onto the torsion spring and the springfixing plate, the front end of the torsion spring is embeddedly fixed onthe two side plates of the connection base, and the rear end of thetorsion spring is embeddedly fixed on the spring fixing plate; when thesupporting framework is rotated, the first and second fixing bases maydrive the spindle and the spring fixing plate to rotate; and when thesupporting framework is rotated to the positioning point, thepositioning block is poked and thus the protrusion of the positioningblock is inserted into the positioning notch of the first fixing baseand the positioning notch of the side plate of the connection base so asto prevent the supporting framework from springing back.
 15. Theanti-pinching structure for supporting frame as defined in claim 14,wherein the side plate of the connection base is disposed with a stoppiece which may be rotated integratedly with the spindle and when thesupporting framework is rotated, the stop piece may abut against the twostop portions of the side plate so as to constrain the rotation angle.